152 BYZANTINE CHURCHES CHAP. The Parecclesion.—The parecclesion forms a complete church of the £four column' type with a narthex and gynecaeum on the west. On the north side the two columns supporting the dome arches have been removed, and their place is taken by a large pointed Turkish arch which spans the chapel from east to west as is done in the north church S.MARY PAMMAKARISTOS \ r >§ o§ 1 I m y PROBABLE ORlQiNAL PLAN FIG. 47. . of the Panachrantos (p. 129). The southern columns are of green marble with bases of a darker marble and finely carved capitals both bedded in lead. One of these columns, that to the east3 has been partly built into the mihrab wall. The arms of the cross and the western angle compartments are covered with cross-groined vaults, while the eastern angle compartments have dome vaults. The bema and the two lateral chapels have cross-groined vaults. As usual the apse is semicircular within and shows to the exterior seven sides.